Here is what worked for me because I have been trying to figure how to work the audio from the computer to the t.v. for forever! Go to your realtek digital output option in the sounds playback option. Make sure your hdmi chord hooked up to your computer and t.v....next right click your realtek digital output option and click the test button inwhich you should hear a jingle on your t.v, and then click play on whatever you want to watch on your t.v. It should play the audio now. Hope it works for you!!